bunnell



(No Model.) 4 SheetsSheet 1.

- M, G. BUNNELL.

STONE AND ORE GRUSHER. 7 No. 548,177. Patented Oct. 22, 1895.

ANDREW GRAHAM.PMO10-UINU.WASNINGTON.D.C.

(No Model.) 4 4 Sheets--Sheet 2. M. G. BUNNBLL.

STONE AND ORE GRUSHEIL No. 543,177. Patented 001;. 22, 1895.-

(No Model.)

. 4 Sheet sSheet 3. M. G; BUNNELL'.

. STONE AND ORE GRUSHER. No. 548,177.

Patented 0%.]22, 1895.

M. PHUTOUTNQWASIIINGTOKEQ I (No Model.) 7 V '4'Sheets-Sheet 4.

M. G. BUN N ELL. I STONE-AND ORB GRUSHER.

' No. 548,177. I

Patented Oct; 22, 1895. I

UNITED STATES PATENT OFFICE.

MORTON G. BUNNELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK G. AUSTIN, OF SAME PLACE.

STONE AND ORE CRUSHER.

SPECIFICATION forming part of Letters Patent No. 548,177, dated October 22, 1895.

Application filed March 11,1895. Serial No. 541,250- (No model.)

To all whom it may concern.-

Be it known that I, MORTON G. BUNNELL, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Stone and OreGrushers, of which the following is a specification.

Prominent objects of my invention are to provide a machine for effectively and rapidly crushing stone and ore of different sizes, to crush such materials to any desired degree of fineness, to prevent the stone and ore from flying up when placed-in the machine and subjected to pressure, to effectively crush and I feed the material, to subject the material to different crushing actions by an improved arrangement of independently-movable crushing-jaws forming one side of a crushing-hopper, to reduce friction and provide an easy working machine, and to provide certain novel and improved details serving to generally increase the efflciency of crushing-machines.

In a crushing-machine or crusher characterized by my invention one side of the crushing-hopper is essentially formed by a couple of linkconnected independentlymovable crushing-jaws which are arrangedone above the other. The lower jaw is preferably suspended by swinging links, and both jaws are backed by arms or extensions which engage with a pitmanQ The pitman is operated by an eccentric and acts as a lever, and in connection with the same is a rolling fulcrum. Various advantages involved in such construction, and further details also involving further advantages, are hereinafter set forth and described in connection with the drawings, in which- Figure 1 is a top plan view of a crusher embodying my invention. Fig. 2 is a central vertical section on line or a: in Fig. 1. Fig. 3 is a transverse vertical section 'on line 1 y in Fig. 2. Fig. 4 is a like section on line 2 z in Fig. 2. Fig. 5 is a view showing adjustable bearings on the pitman and abutment. Fig. 6 shows one of the links E'with adjustable bearing portions. Fig. 7 is a like view of one of the links G.

Referring to the first four figures of said drawings, the oblong frame A comprises the two sides a a and the ends a (1,, thereby providing'a simple and convenient construction. The stationary jaw B is arranged at one end of the frame, and is desirably inclined so as to form one of the walls of a crushing-hopper. The wall of the hopper opposite the stationary jaw is formed by a couple of movable crushing-jaws O and D, arranged one above the other and operating independently of each other. The upper jaw O is connected with the lower jaw D by a couple of links E, which are attached to the upper jaw by a transversely-arranged pivot F, and in like manner attached to the lower jaw by a transverselyarranged pivot G. These pivots extend through bearings on the rear sides of the movable jaw, and to such end the upper jaw is provided with a bearing 0 for the pivot F, and the lower jaw is provided with a bearing 01 for the pivot Gr- The links are arranged upon the ends of these pivots, and for the purpose of taking up wear each link (see Fig. 6) contains a sectional bearing, comprising the two end bearing portions f f and the middle bearing portion f, by which arrangement the bearings can be adjusted by means of an adj usting-screw f arranged upon each link and engaging one of 'the end bearing portionsf.

The lower jaw D is suspended by links D which are also provided with adjustable bearin'gs for the purpose of taking up wear. The links which connect the upper and lower jaws are arranged in planes between the sides a of the frame A, while on the other hand the links D which support the lower movable jaw, (and as incident tosuch also support or uphold the two movable jaws,) are arranged outside of the frame and hence work in ployed in connection with the links E could be provided; but as a preferred arrangement each link D is made U-shap'ed, so as'to provide straight arms of, upon'which the bearing portion (1 is fitted to slide and held in adthe pitman, as illustrated in Fig. 2.

justment by nuts d on the threaded endsof said arms.

The main frame is constructed with suitable bearings for a rotary driving-shaft H, which is provided with balance-wheels I, an eccentric J, and a belt-pulley K. This eccentric works within the head Z of a pitman L, which extends downwardly from its said head portion and operates between arms 0 D, respectively, on the upper and lower jaws, and a movable fulcrum M, arranged between the pitman andan abutment N at one end of the main frame. The arms G and '1') extend back from the jaws G and D and engage with the pitman by knuckle-joints, to which end the arms are provided with end knuckles 0' cl, respectively engaging in sockets Z" l in Obviously the knuckles could be arranged on the pitman and the sockets could be made in the arms.

The joint between the arm C of the upper jaw and the pitman is arranged above'the joint between the ar of the lowerjaw and the pitman, and hence of such two joints or connections the con nection between theupper jaw and the pitman is relatively the nearest to the eccentric. The movable fulcrum which is arranged between the pitman and the abutment is upheld by providing it with toothed face portions, which engage with toothed portions of the pitman and abutment, as illustrated. The movable jaws are subject to. springs tending to oppose their-forward movement with a yielding spring resistance, In illustration of one of various arrangements which can be employed, a rod P is hinged to the lower jaw and extended through a springcushion Q at the rear end of the main frame.

With this arrangement the rod is provided with a nutp, which bears against therear end of the spring-cushion, and, if desired, two rods and springs thus arranged can be provided for the lower jaw. For a like purpose a rod P is hinged to the upper jaw and connected with a spring Q, arranged upon the arm D of the lower jaw. Obviously, however, the rod attached to the upper jaw could be extended back and connected with a spring at the rear end of the main frame, and, if desired, two of such rods and springs can be provided for said upper jaw.

The links D are connected with the. lower jaw either below or adjacent to the lower portion of the latter, and from such points the said links incline upwardly and forwardly toward the level of the top end of the stationary jaw. It will also, be observed that the links E incline similarly to the links D The movable fulcrum M is distinguishable from the toggle and arms provided in various prior patents in connection with a pitman arranged between a pairof togglerarms, whereof the forward arm extends back from the movable crushing-jaw.

A prominent distinguishing feature in. my

improved machine resides in the fact that the fulcrum is a rolling fulcrum and that it rolls upon plane surfaces, whereby the great friction due to the crowding and forced slipping movement in preceding devices is avoided. Where the fulcrum is toothed, as in Fig. 2, the opposite toothed portions n n are in arcs formed by one and the same circle, and hence the fulcrum M may be considered as a circular piece, it being observed that segmental portions of such circular piece are cut away simply to save material. During the rotation of the eccentric in the direction of the arrows in Figs. 2 and 5 and the downstroke or throw of the pitman the upper movable jaw advances or moves toward the stationary jaw and the lower jaw retracts or moves in a direction away from such stationary jaw, and,

conversely, when the pitman makes its upstroke the upper movable jaw retracts while 1 the lower movable jaw advances. The upper movable jaw also moves downwardly during its advancement and upwardly during its retraction, and in like manner the lower movable jaw moves downwardly during its advancement and upwardly during its retraction, whereby during the crushing actions the jaws will tend to feed the material downwardly through the crushing-hopper, of which they form portions. The movable jaws have also rocking motions, so timed that during the initial portion of each advancing movement of each jaw its upper end portion will tilt forward toward the stationary jaw and thereby keep the stones or rocks down and prevent the same from flying upwardly from the hopper. The upper preliminary crushing-jaw has also a more direct action than the lower The arms of the jaws are arranged, respectively, above and below a horizontal plane intersecting the center of a circle on which the two bearing portions of the rolling fulcrum are formed. Variations in the extent of stroke on the part of the movable jaws can therefore be varied by raising or lowering the fulcrum so as to raise or lower the middle point of its rotary reciprocating movement, and to such end the lines of teeth Z and n, respectively upon the pitman L and the abutment N, can be made somewhatlonger than the extent of track along which the toothed fulcrum will reciprocate when arranged as in Fig. 2; or, in place of such arrangement, the line of teeth on the pitman could be extended as in said figure, and an adjusting-screw R could be provided for raising and lowering the abutment N.

While I prefer a toothed rolling fulcrum arranged to engage straight toothed tracks, respectively, on the pitman and the abutment, I may omitsuch teeth, as in Fig. 5, in which the rollingfulcrum has smooth rounded bearingsurfaces engaging straight and smooth bearing-surfaces on the pitman and the abutment.

l In such case the bearing-surfaces on the pitjaw, whereby desirable results are obtained.

ICO

man and the abutment can be formed by walls .9 of recessed bearing-pieces 'S S, which are adjustably secured in place by adj ustingscrews T and T. The lower end walls of the recesses prevent the rolling fulcrum from dropping down from between the pitman and the abutment, and by adjusting the bearingpieces S and S the bearings along which the fulcrum will roll can be raised and lowered. The extent of stroke on the part of either movable jaw can also be determined by the distance between the point at which the arm engages the pitman and a line passing horizontally and centrally through the rolling fulcrum. As a matter of further improvement, the bearing ends of the arms 0 and D can, as shown in Fig. 5, be formed on the arcs of circles and arranged to engage straight bearing-surfaces V V on the pitman, thereby lessening friction during operation.

With further reference to the rolling fulcrum it will be seen that, regardless of its movement, it will have two diametrically-opposite bearing portions inconstant engagement with plane or straight bearing-surfaces on the pitman and abutment, and that such diametrically-opposite bearing portions will at all times be at an invariable distance apart, it being understood that the teeth shown in Fig. 2 simply keep the fulcrum from dropping down from its working position between the opposing bearing-surfaces on the pitman and wall or abutment. In this way friction is lessened and easier operation insured, and at the same time when the pitman, which acts as a lever, serves in effect to pry forward either movable jaw the pitman will be backed by a fulcrum having the points whereat it engages the pitman and abutment substantially on a line with the arm of the jaw.

With further reference to the rolling fulcrum it is understood that it is bodily adj ustable either up or down when arranged as in Figs. 2 and 5, since in both instances it is capable of such adjustment. With further reference to links F it is understood that they both serve to provide a jointed connection between the jaws and also to control to a certain extent the movement of the upper jaw, and that such action will be modified by the inclination of such links. It is obviously possible to dispense with links D and provide the lower jaw with pivots having antifriction rolls arrangedto travel 'in inclined ways, although the links constitute a preferred arrangement.

I am aware that it is not new to provide a crusher with a couple of independently-mow able crushing-jaws arranged one above the other, illustrations of such being, for example, found in United States Letters Patent Nos. 225,104, 473,725, and 480,761. My invention, however, contemplates and involves various matters of improvement in crushers thus provided with a couple of independentlymovable crushing-jaws.

What I claim as my invention is- 1. A crusher having a crushing hopper comprising a pair of independently movable jaws forming one of its sides and connected together by links, substantially as described.

2. A crusher having a crushing hopper comprising a couple of independently movable jaws provided with rearwardly extending arms, and a single operating pitman in engagement with said arms of the independently movable jaws, substantially as described.

3. A crusher having a crushing hopper comprising a movable jaw, a rolling fulcrum, and a pitman arranged between the jaw and the rolling fulcrum and operating as a lever, substantially as described.

4. A crusher having a crushing hopper comprising a pair of independently movable jaws,

a rolling fulcrum, and a pitman arranged between the movable jaws and the rolling fulcrum and operating as a lever, substantially as described.

5. A crusher having a crushing hopper comprising a pair of independently movable and link connected jaws arranged one above the other, and swinging links by which the lower jaws are suspended, substantially as described. v

6. A crusher having a crushing hopper comprising a pair of independently movable jaws arranged one above the other, links E connecting the two jaws, and links D by which the lower jaw is suspended, the links E being arranged to incline forwardly and upwardly, substantially as described.

7. A crusher having a crushing hopper comprising a pair of independently movable jaws arranged one above the other, links E connecting the two jaws, and links D by which the lower jaw is suspended, the links D being arranged to incline upwardly and forwardly, substantially as described.

8. A crusher having a crushing hopper comprising a pair of independently movable jaws arranged one above the other, links connecting said jaws, and links by which the lower jaw is suspended, the said links being provided with adjustable bearings arranged for taking up wear, substantially as described.

9. A crusher having a crushing hopper comprising apair of independently movable jaws having arms 0', D, and a pitman having straight bearing portions engaged by rounded ends of said arms, substantially as described.

10. A crusher having a crushing hopper comprising a movable jaw, a rolling fulcrum, and a pitman arranged between the movable jaw and rolling fulcrum and operating as a lever, said rolling fulcrum being bodily ad justable, substantially as and for the purpose described.

11. A crusher having a crushing hopper comprising a pair of independently movable link connected jaws having arms 0, D, a pitman having bearings engaged by said arms, and rolling fulcrum engaging adjustable bearings, one of said bearings being arranged upon tween the pitman and an abutment, substanthe pitman, substantially as described. stantially as described.

12. A crusher having a crushing hopper comprising a pitlnan L operated by an eccen- MORTON G. BUNNELL. 5 tric, a pair of independently movable link- Witnesses:

connected jaws having arms engaging the pit- ARTHUR F. DURAND, man, and a movable fulcrum arranged be- RETA M. WAGNER. 

